Two stage float valve

Details Two stage float valve Two stage float valve

1977-06-16

1982-08-03

Walton, George L.

Fluid handling

Siphons

Periodic or accumulation responsive discharge

4324, 4405, 4378, 137430, 137433, 13763014, 13763015, 137414, 222 67, 251 38, 251282, 251335B, F16L 4300, F16K 3118

Patent

active

043423280

ABSTRACT:
A normally-open two stage float valve for use with a suction tube leading om a vehicle fuel tank. As the fuel tank begins to run dry it is desired that the float valve close off the tank to the suction force. The valve of this invention includes a float-operated pilot valve element that equalizes forces on the opposite faces of the main valve element as the float moves through its actuation stroke. A lifting head is associated with the pilot valve element for mechanically lifting or lowering the main valve element relative to the main seat when the forces have been equalized.

REFERENCES:
patent: 1906277 (1933-05-01), McGee
patent: 2045653 (1936-06-01), Hoyt
patent: 2511545 (1950-06-01), Roselair
patent: 2625950 (1953-01-01), Clover
patent: 2996727 (1961-08-01), Rose
patent: 3196699 (1965-07-01), Ipsen
patent: 3826465 (1974-07-01), Whittaker et al.

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